Motor-cooling system



Jan. '21, 1930.

N. E. WAHLBERG MOTOR COOLING SYSTEM Filed Jan. 25, 1928 2 Sheets-Sheet l a/cdbe @bg Jan. 2 1, 1930; N. E. WAHLBERG 1,744,184

MOTOR COOLING SYSTEM Filed 1.928 2 Sheetsl-Sheet 2 Patented Jan. 21, 1930 UNITED STATES PATENT oFnc-r.

NILS ERIK 'WAHLBEBG, OF KENOSHA, WISCONSIN, ASSIGNOR THE NASH MOTORS COMPANY, OF KENOSHA, WISCONSIN, A OORPOQRATION OF MARYLAND Moron-cocaine sYs'rnn:

Application filed January 25, 1928 Serial-No. 249,216.

This invention relates to, improvements in internal combustion motors, and has for its principal object to provide an impro'vedcon struction thereof utilizing a spacer of'alumn num or similar metalhaving high heat'con dissipating qualities of said spacer.

The invention may best be understood by reference to the accompanylng drawing, 1n

which Figure 1 shows an upper fragmentary portion of a motor cylinder block in vertical cross sectiion to which my invention has been aplie p Figure 2 is a plan View of a spacer, in part section, constructed in accordance with my invention.

Figure 3 is a side view, in part sectipn, of the spacer shown in Figure 2. In the drawings, 10 denotesa multi-cylinder casting of the usual form, such as cast iron or its equivalent, including an integral water jacket 11. Pistons 12-12 of any approved form, such as cast iron, or aluminum alloy, are mounted in the cylinders, as usual. A cylinder head 13 also of cast iron is provided, in the form shown said head including a water jack 14 and valve seats 15, 15 for valves 16, 16 ofthe overhead type. The operating mechanism for the valves is'omitted as it forms no part of the invention.

Referring now more particularly to the novel features of my invention, I provide a spacer 20 of substantial height inserted between the upper end of the main cylinder body 10 and the cylinder head 13. This spacer is preferably made of aluminum or similar metal having a relatively high heat conductiv ity, although such metals as a rule lack {the strength and wear-resisting qnalitiesofcast iron or thelike, usually utilized in cylinder castings.

for hearing parts in combination with cylin- Furthermore, such metals" ordinarily have a different coeflicientlof elsqiansion; so they cannot ordinarily-be used successfully make use .offthe cooling properties of the aluminum, or the like, without its attendant disadvantages by terminating the main cylinder body 10 substantially at the upper limit of movement of the pistons 1212, so that the latter have their usual bearing engagement with the cylinder walls throughout their stroke. Furthermore, the valve seats and valve mechanism are mounted as usual in the cylinder head 13 so that the standard valve construction is mounted in the cylinder head casting, as usual.

The water jackets 11 and 14 of the cylinder body and cylinder head, respectively, communicate with water passages 21 extending through the aluminum spacer 20, so that the latter passages form a part of the water cooling system of the motor. With this arrangement, the superior strength and wear-resisting qualities of the usual cylinder casting.

metal are retained where needed, but the heat" is conducted more rapidly from the combustion chambers through the inner walls of the aluminum spacer and carried away by the water, than is the case with ordinary full cast-iron cylinder construction, thus resulting in more efficient cooling of the combustion chamber than has heretofore been practical.

The construction above described is especially advantageousin motors of the valve-m head type, wherein the available cooling area is limited by the provision of valves and valve seats,but manifestly it can also be a plied to L-head orfother types of motors to su stantial advantage Y without in" any way afiecting standard features of construction of the valve mechanism and associated parts. I claim as my invention: 1. In a motor and in combinatlon with a cylinder casting and detachable cylinder head.

casting, a metal spacer of relatively high heat conductivity of the order of aluminum insertedbetween said cylinder casting and cylinder head and forming a substantial part of the wall area of the combustion chamber cylinder casting and, a detachable cylinder.

head casting having valves and valve operating mechanism carried thereby, a metal spacer of relatively high heat conductivity of the order of aluminum insertedjbetween said cylinder casting and cylinder head and forming a substantial art of the wall area of the combustion cham er above the limit of movement of the piston within said'cylinder.

3. In a motor and in combination with a cylinder casting, and a detachable cylinder head castin both provided with water jack- I ets, a meta spacer of relatively high heat conductivity of the order of aluminum inserted between said cylinder casting and cylinder head and forming a substantial part of the wall area of the combustion chamber above the cylinder casting, said spacer having apertures t erethrough communicating wit said water jackets and forming part of the water cooling system of said cylinders.

4. In a motor and in combination with a cylinder casting, and a detachable cylinder head casting, both of cast iron, an aluminum spacer inserted between said cylinder castin and cylinder head and forming a substanti part of the wall area of the combustion chamber above the limit OfiQlOVBIIlQIlt of the piston within said cylinder.

Signed at Kenosha, Wis, this 17th day of January, 1928-.

NILS ERIK WAHLBERG. 

